One of the bigger islands in the bay, Collanmore was a base of Les Glénans, a non-profit sailing school. The base taught dinghy and catamaran sailing and sail-boarding. Collanmore enjoys magnificent views of Croagh Patrick and the bay. It is accessed by boat from Rosmoney pier, a few kilometres from Westport, County Mayo. In 2011 there were 4 registered inhabitants of Collanmore Island.